Other uses

A symbol identifying a genetic lineage as a paragroup of a specified haplogroup

Star (game theory), the value given to the game where both players have only the option of moving to the zero game

In linguistics, a symbol that prefixes a word or phrase that, in historical linguistics, is a reconstructed form for which no actual examples have been found; and in linguistics of a modern language (see: synchronic linguistics), is judged ungrammatical